Jump to content

Conditional short-circuit current

From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by ClueBot NG (talk | contribs) at 14:01, 31 October 2017 (Reverting possible vandalism by 148.253.167.122 to version by Wbm1058. Report False Positive? Thanks, ClueBot NG. (3174306) (Bot)). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Conditional short-circuit current is defined as the value of the alternating current (a.c) component of a prospective current, which a switch without integral short-circuit protection, but protected by a suitable short circuit protective device (SCPD) in series, can withstand for the operating time of the current under specified test conditions. It may be understood to be the RMS value of the maximum permissible current over a specified time interval (t0,t1) and operating conditions. The IEC[1] definition is critiqued to be open to interpretation.[2]

References

  1. ^ IEC 62314-1, The International Standard on Solid-State Relays, Ed 1, Section 3.1.11
  2. ^ Gurevich, Vladimir (2011). Digital protective relays: problems and solutions. Boca Raton: CRC Press. p. 360. ISBN 978-1-4398-3785-6.